- (void)setDefaultWebViewUserAgent
{
// Get Default UserAgent.
UIWebView *webView = [[UIWebView alloc] initWithFrame:CGRectZero];
NSString *agent = [webView stringByEvaluatingJavaScriptFromString:@"navigator.userAgent"];
// Mozilla/5.0 (iPhone; CPU iPhone OS 7_1_2 like Mac OS X) AppleWebKit/537.51.2 (KHTML, like Gecko) Mobile/11D257
// Save it.
NSDictionary *dictionary = [NSDictionary dictionaryWithObjectsAndKeys:[NSString stringWithFormat:@"%@;V Pass WebView", agent], @"UserAgent", nil];
[[NSUserDefaults standardUserDefaults] registerDefaults:dictionary];
}